CK1E: an ubiquitous protein kinase of the CK1 family. Together with Dvl-1 and Frat-1 activate the Wnt signaling pathway. Central component of the circadian clock. May act as a negative regulator of circadian rhythmicity by phosphorylating PER1 and PER2. May play a role in cell cycle progression. Two splice variant isoforms have been described. Component of the circadian core oscillator, which includes the CRY proteins, CLOCK, or NPAS2, BMAL1 or BMAL2, CK1-D and/or CK1-E, TIMELESS and the PER proteins. Interacts directly with PER1 and PER2 which may lead to their degradation. Interacts with SOCS3. Mutations in hamster and Drosophila orthologs have circadian rhythm phenotypes, and the circadian gene period (per) is a substrate in both human and fly. A coding SNP variant in human, which increases CK1 activity, is negatively associated with circadian disorder. LOF mutations and LOH seen in mammary ductal carcinoma.
Protein type: Protein kinase, Ser/Thr (non-receptor); Protein kinase, CK1; Kinase, protein; EC 2.7.11.1; CK1 group; CK1 family
Chromosomal Location of Human Ortholog: 22q13.1
Cellular Component: cytoplasm; ribonucleoprotein complex; nucleus; cytosol
Molecular Function: protein serine/threonine kinase activity; protein binding; ATP binding; protein kinase activity
Biological Process: circadian rhythm; negative regulation of Wnt receptor signaling pathway; Wnt receptor signaling pathway; organelle organization and biogenesis; endocytosis; signal transduction; DNA repair; regulation of circadian rhythm; protein amino acid phosphorylation; regulation of cell shape; peptidyl-serine phosphorylation; positive regulation of proteasomal ubiquitin-dependent protein catabolic process; mitotic cell cycle; circadian regulation of gene expression; G2/M transition of mitotic cell cycle
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